Abstract
The hydrochemical characteristics of surface water are studied to understand their source, type of water, and evolution. This study aims to determine the hydrochemical characteristics and controlling factors, by evaluating the water quality of the Sidakan-Balakyan River. The samples were collected along the Sidakan-Balakyan River to the junction point of the Sidakan-Rwanduz Rivers, for each sample, physical (pH, EC, Temperature, Turbidity, TDS and T.H) and chemical parameters (Mg2+, Ca2+, K+, Na+, HCO3-, Cl-, SO42- and NO3-) were analyzed. The results showed that all water samples were within the acceptable range. The results obtained from the Piper and Chadha diagram indicate that the studied water samples during High Flow Period is Mg- Bicarbonate type as well as Ca+2 and SO4-2, whereas during Low Flow Period in Sidakan river is Mg2+- Bicarbonate, But in Balakyan and Rwanduz rivers are Ca2+- Bicarbonate. Moreover, based on Gibbs Diagram, water samples were distributed in the rock weathering dominance section. Based on TDS and T.H of water samples were found to be moderately hard fresh water. Additionally, the river water can not be used for drinking directly. Most samples have a good to excellent water quality index except for some samples which are unsuitable during High Flow Period.
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